Duncan has two serious passions.

The Englishman enjoys traveling the world.

And eating pizza.

So much pizza.

He seriously can't get enough of the stuff.

The Seattle resident documents his culinary adventures on Instagram.

He's racked up over 5,000 followers who keep tabs on Duncan's cheese-topped travels.

From grabbing a pie in Thailand.

To this classic New York slice.

Or even chowing down at this exotic Costco in Seattle.

Duncan always manages to find some pizza wherever he is.

He told Elite Daily he's eaten slices in over 30 countries.

Not surprisingly, he's a big fan of the pies in New York City. "During my last trip to New York City, I managed to eat at 10 different pizza shops within 36 hours of being there," Duncan told Elite Daily.